Virtual disk selection parameter (WMI)
Determines the kind of disks on the virtual machine that are included in the backup. This parameter can reduce the size of the backup, but should be used with care. The following options are intended only for the virtual machines that have multiple virtual disks.
Include all disks
This option is the default. Backs up all virtual disks that are configured for the virtual machine.
Exclude boot disk
The virtual machine's boot disk (for example the C drive) is not included in the backup. Any other disks (such as D) are backed up. Consider this option if you have another means of recreating the boot disk, such as a virtual machine template for boot drives.
Note:
A virtual machine that is restored from this backup cannot start. Data files are available in the restored data disks.
Exclude data disks
The virtual machine's data disks (for example the D drive) are not included in the backup. Only the boot disk is backed up. Consider this option only if you have a different policy that backs up the data disks.
Note:
When the virtual machine is restored from the backup, the virtual machine data for the data disk may be missing or incomplete.